Granted Patent
Utility
US 5,227,547 · App. 07/914,591
Method for producing dichloropentafluoropropanes
Inventors:
Keiichi Ohnishi, Hidekazu Okamoto, Toshihiro Tanuma, Koichi Yanase, Toru Kawasaki, Ryutaro Takei
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jul 20, 1992
Inventors
Keiichi Ohnishi
Hidekazu Okamoto
Toshihiro Tanuma
Koichi Yanase
Toru Kawasaki
Ryutaro Takei
Assignee (at issue)
ASAHI GLASS CO., LTD.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.